Pneumatic tool.



E- W. RAIKBS.

PNEUMATIG TOOL.

APPLIUATION FILED 00T. za, 1910.

LWHM., 111111111811 11115115, 1913.

IIIII l i mumm- 11111111111 @y fNUEHU/M ffy UNITE EDMOND W. RAIKES, OF CLEVELAND, OHIO.

rNnUMAirro Toon.

noemen.

Specification of Letters atent.

Patented July 15, 1913.

Application filed October 2851910. .Serial No. 589,576.

To all whom, t may concern.'

ABe it known that l, EDMoND W. Ramas, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, have invented a. certain new and useful lmprovement in Pneunatic Tools, of which the following isa full, c ear, and :exact description, reference being had to the accompanying drawings.

The object of this invention is to provide very simple, and at the same time, eiiicient means for securing the handle to the body of a pneumatic tool. The body lof the tool may be a barrelflike structure and the handle'of the spade-handletype. The body and handle are =--provided with coperating re cesses and projections adapted to interlock to hold the handle in place, while a clear lspace is `provided .to enable the separation ofthe parts. The interlocking projections and recesses are preferably surfaces about 'a common center, so that a rotation of'the handle relative to the bodyabout said cen ter may effect the locking or unlocking of the parts. These, and other features, providing a simple and effective tool-frame, are comprised' within-my invention, which is illustrated herein and hereinafter more fully described.

ln the drawings, `Figure 1 is a side elevation of the tool complete; Fig. 2, a longi-` tudinal section; Fig. 3, a cross section in a' plane indicated by line 3-3 of Fig. 2, this plane being slightly offset for convenience of illustration; Fig. 4 .is an enlarged end view, looking from the right hand end of Figs. 1 and 2.,l

`leferrin'g by reference numerals `to the illustration of the drawings, 10 represents thc body ofmy tool. This is shown as' having a cylindrical bore 11 in which is mounted a reciprocating plunger 12. This plunger has a reduced forward extension 13 which is adapted -to impinge against and deliver `a blow to the .member 14, movable in the outer end of the barrel. This member 14 is shown as a die block for a rivet, and is to be' taken as illustrative of any driven 'memberi irrespective of its form. An in-l ternal annularvflange 16 provides an abut- `ment for limiting vthe outward movement of the plunger. 'This plunger is put into the barrel through the open inner end thereof, which is afterward closed by the screw plug 17..

The vpresent linvention is independent of the particular system or location of the air passageways. For clearness and completeness, however, it may be stated at this point that air is admitted through a passageway 20 contained within a tubular plug 21, hereina-fter referred to, 'and thence passes to the y admission valve chamber '22, in which is the admission valve, 23 (controlled by mechanism to be hereinafter described), and beyond this admission valve, theairpasse's via passageway 24 (Fig. 3) tothe main valve chamber v,25, which is provided by'. a suitable tubular .casing within the body. In this chamber is apneumatioally operating valve 19, which controls :the passageways to and from the cylinder.l vThe valve chambers' are in a :boss 26 on the side of the main barrel l0. @ne of the .admission passage ways is direct from this -boss into the barrel and the -other leads tothe other end of the barrel within a longitudinal4 enlargement- 27. In Fig. 2, 28 indicates two ports within the barrel, which communicate with the main valve chamber 25. This valve chamber has two exhaust ,passagewaya one terminating at the end of the boss 26 alongside. of the barrel, as shown at 29, and the other at the side of the boss at, 49, as hereinafter referred to.

Coming now to the parts with which the present application is specifically conce1-ned, 40 indicates a handle of spade-handle form, which, in use, is tightly secured to the body. dn order to enable the plunger to be removed at the inner end, it is necessary that this handle be removable. At the same time, aslthe handle is placed where the manual pressure is exerted to hold Ithe tool to its work, the securement between the handle andv the body must lie firm and eifective. In accomplishing the result of ready removability and tight securement of the handle, I form on the body opposed arcshaped projections or ribs 33 and 34, which are integral with the body and having cylindrical surfaces struck about the same center. It will be seen that the rib `33 lies alongside of the barrel 10 while the rib '34. is formed on the outer side of the valve casings. -Coperating with the ribs` and 34 tion, that by turning the handle about the axis of the ribs and grooves, it may be putin place or removed. 'To mount it,y it is simply placed with the wings opposite the narrower portion of the body between the ribs 33 and 34 and with the grooves circumferentially alining with those ribs, and then the handle is turned about the axis referred to until the wings embrace the ribs, as shown in the, drawings.' The bushing 21, which has the main admission passageway, furnishes also means for locking the handle against displacement on the body. To effect this, the bushing is screwed through the wing 42 ofthe handle into the body and has a shoulder 35 bearing against the wing. The outer end of this bushing has an angular head 3,6 to enable it to be conveniently turned by a wrench. Its inner portion has exterior screw-threads as shown. Internally it has also a `screw-thread 37 for the admission valve.

.reception of the main admission pipe.

va position to openjcommunication to the barrel.

As heretofore stated,.the main valve is in a chamber rovidedby-the casing 25. The inner end o this chamber is shown as closed by a screw plug 30, which holds the casing in place in the boss 26. The .effective throw of the main valve may be regulated Vby a. stop screw 31 screwing through the plug 30 and locked by a jam nut 32. It is convenient' to have the exit for one of the exhausts through the side of the boss 26 at the cylindrical surface 4of the rib 34, and I accordingly provide a y.notch 49, (Fig. 4) in the inner and'lower -face of the wing 42, communicating-with the exhaust passageway and forming an exit port, as shown.

It will be. seen from the description heretofore given that, when the parts are in vremove the handle to clean or repair either the valves or the piston, or the other parts,

it is simply necessary to knock out the pivot pin of the'bell-crank 55, remove the bellcrank, `screw out the plug 2l, and give the 'handle a quarterv turn about the axis of its wings.

Having thus described my invention, what I claim is l. In a pnuematic tool, the combination of a barrel and a valve casing forming an oblong head on the barrel, of an arcual member on the casing'and a second arcual member on the barrel and a handle having arcual` members adapted to engage the first said arcual members Ato hold the handle rigid with the barrel.

2. In a pneumatic tool, the combinationof a vbarrel and a valve casing forming an oblong head on the barrel, of an arcual mem' ber on the casing and a second arcual member on the barrel, said arcual members being struck on different radii about the same center, and a spade handle having separated arcual members adapted to engage the first said arcual members to hold the handle rigid with the barrel.

3.-' In a pneumatic tool, the combination of aV body, a boss near its head, an arcualy rib on said boss, an arcual rib on the body diametr'ically opposite and concentric with the rib lon the boss, each rib being not more than a quarter of a circumference, a handle having a projection at each end, wings on these projections having arc-shaped re.

vcesses vadapted to co-perate with arcual ribs, both said ribs` and recesses beingnot more than one quarter of a circumference, and means whereby the wings may be locked with the recesses in engagement with. the

ribs.

4, In a pneumatictool, the combination of a body, two diametrically opposite arcual ribs near its head end, each being not more thanv one quarter of a circumference, a spade handle, the projecting portions of which have arcual grooves coperating with the ribs,'and a plug for locking the handle with the grooves engaging the ribs having a central passageway for the reception of the main admission pipe. v

In a pneumatic tool, the combination of a body, a boss near its head, an arcual rib on said boss,.said rib having a partly cylindrical surface struck about the center of the 1ody, a diametrically opposed rib having a 'partly cylindrical surface struck aboutthe same center, a handle having a shank, wings on said shank, arcual grooves in said wings, said grooves having partly cylindrical surto the body, such plug being threaded to re- 10 ceive the connection of the main admission faces engaging the cylindrical surfaces on pipe.

said ribs, llanges formed on' the wings and In testimony whereof, I hereunto aliX my extending inwardly to engage the sides of signature in the presence of two witnesses.

said ribs, and a plug having an internal passage and adapted to screw into the ribs on the boss and extend through the wing engagL ing said ribs, whereby the handle is locked EDMOND W. RIAIKES. Witnesses ALBERT H. BATES, J. B: HULL. 

